B&P Lamp 4 Inch Diameter Solid Brass Vase Cap, Unfinished - This is a 4" solid (spun) brass vase cap or lamp cap, It has an unfinished brass finish with a 1/8 IP (center hole) slip,. Features Include: Solid spun brass vase cap or lamp cap, Slips a 1/8IP which measures 3/8 inch diameter, This can be used in a number of different ways to create or transform a lighting fixture or lamp, Produced by B&P Lamp Supply